-10 IGX 8 Installation Manual, Release 8.2.0
ATM Interface
Network Synchronization
Type of Service: Permanent Virtual Circuit (PVC)
Interface Types: User-to-Network (UNI) and Network-to-Network (NNI) per ITU
I.361 and I.363
Data Rates: T3 or E3
ATM Layer: Physical Layer Convergence Protocol per AT&T publication
TA-TSY-00772 and 000773 for T3; ITU I-361 with HEC for E3
Cell Rate: 96,000 cells/sec. for T3, 80,000 cells/sec. for E3
Adaptation Layer: AAL5
No. of Ports per card: 4
No. of PVCs per card: 255
VPI Addressing Range: 0–255
VCI Addressing Range: 0–65535
Traffic Queues: CBR, VBR, and ABR
Management Protocol: Interim Layer Management Interface (ILMI)
External Clock Sources: The IGX switch synchronizes to the nearest, highest-stratm clock available.
Any T1, E1, T3, E3, OC3 (STM-1) line, trunk, or optional external clock
inputs can serve a clock source.
Internal to Node Source: T1: 1.544 MHz, ± 10 ppm (stratm 4)
E1: 2.048 MHz, ± 10 ppm (stratm 4)
Clocking Hierarchy: Dynamic primary, secondary, and tertiary clocking
Without a defined external clock reference, the IGX defaults to its internal
clock source.
